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  • UIStepper 缩放:UI的使用

    // 实现文件:声明在对应的.h文件。继承至UIViewControllor

    - (void)viewDidLoad

    {

        [super viewDidLoad];

        // 按钮

        self.stp = [[UIStepper alloc] initWithFrame:CGRectMake(20, 30, 150, 30)];

        self.stp.tintColor = [UIColor whiteColor];

        self.stp.value = 5;

        self.stp.maximumValue = 5;

        [self.view addSubview:self.stp];

        

        // 默认背景

        self.view.backgroundColor = [[UIColor alloc]initWithPatternImage:

                                    [UIImage imageNamed:@"beijing1.jpg"]];

        // 创建视图

        self.imv = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];

        // 自动缩放

        self.imv.autoresizingMask = UIViewAutoresizingFlexibleWidth |

        UIViewAutoresizingFlexibleHeight;

        

        [self.view addSubview:self.imv];

        

        // 事件

        [self.stp addTarget:self action:@selector(changeState) forControlEvents:UIControlEventValueChanged];

        

    }

    - (void)changeState

    {

        // 每次都重置,保证是从6plus的基础上改变

       self.imv.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);

        

        // default is iPhone6plus: 414 735

        switch ((int)self.stp.value)

        {

            case Phone:// 240 320

                self.imv.frame = CGRectInset(self.imv.frame, 174, 215);

                self.imv.image = [UIImage imageNamed:@"Phone.jpg"];

                break;

            case iPhone4:// 240 320

                self.imv.frame = CGRectInset(self.imv.frame, 174, 216);

                self.imv.image = [UIImage imageNamed:@"iPhone5.jpg"];

                break;

            case iPhone5:// 320 568

                self.imv.frame = CGRectInset(self.imv.frame, 94, 168);

                self.imv.image = [UIImage imageNamed:@"iPhone5.jpg"];

                break;

            case iPhone6:// 375 667

                self.imv.frame = CGRectInset(self.imv.frame, 39, 69);

                self.imv.image = [UIImage imageNamed:@"iPhone6.jpg"];

                break;

           case iPhone6plus:// 414 736

                self.imv.frame = CGRectInset(self.imv.frame, 0, 0);

                self.imv.image = [UIImage imageNamed:@"iPhone6plus.jpg"];

                break;

            default:

                self.view.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"beijing.jpg"]];

                break;

        }

        

        

         NSLog(@"%f", self.stp.value);

    }

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  • 原文地址:https://www.cnblogs.com/pruple/p/5260075.html
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